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DEBT - Redemption of $2,650 million of Senior Subordinated Notes due 2027 (Details) - USD ($) $ in Millions			12 Months Ended
	Jun. 20, 2025	May 20, 2025	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2023
Debt Instrument [Line Items]
REFINANCING COSTS			$ 11	$ 58	$ 56
5.500% senior subordinated notes due 2027 (“5.500% 2027 Notes”) | Senior Subordinated Notes
Debt Instrument [Line Items]
Debt Instrument, repurchased face amount	$ 2,650
Interest rate			5.50%
Debt instrument, redemption price, percentage	100.00%
REFINANCING COSTS			$ 7
6.375% senior subordinated notes due 2033 (“6.375% 2033 Notes”) | Senior Subordinated Notes
Debt Instrument [Line Items]
Interest rate		6.375%	6.375%
Debt instrument, redemption price, percentage		99.225%

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The aggregate expense charged against earnings for refinancing the entity's debt structure, comprising the premium paid to redeem senior subordinated notes, the write off of debt issue costs and unamortized note premium and discount, and costs for settlement of interest rate swap agreement and other expenses.

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